feat: Add anonymized telemetry to report product usage (#2273)

* feat: Add anonymized telemetry to report product usage

This adds a background service to report telemetry to a Coder
server for usage data. There will be realtime event data sent
in the future, but for now usage will report on a CRON.

* Fix flake and requested changes

* Add reporting options for setup

* Add reporting for workspaces

* Add resources as they are reported

* Track API key usage

* Ensure telemetry is tracked prior to exit

coderd/database/models.go

@@ -426,6 +426,11 @@ type ProvisionerJobLog struct {
 	Output    string    `db:"output" json:"output"`
 }
 
+type SiteConfig struct {
+	Key   string `db:"key" json:"key"`
+	Value string `db:"value" json:"value"`
+}
+
 type Template struct {
 	ID                   uuid.UUID       `db:"id" json:"id"`
 	CreatedAt            time.Time       `db:"created_at" json:"created_at"`